Milling mechanism for hydraulic oil cylinder

The utility model provides a milling mechanism for a hydraulic oil cylinder. The milling mechanism comprises a machine body. The front end of the machine body is provided with a rotation shaft case; a guide rail is mounted on the machine body; the guide rail is provided with a tail seat; the guide rail is further provided with a slide seat; a drilling mechanism and the milling mechanism are respectively mounted on two ends of the slide seat; the machine body is provided with a protection cover; a push-pull chain is mounted between the protection cover and the slide seat; and one side of the rotation shaft case is provided with a system control case. In the milling mechanism, a common machine tool works as a machine, a numerically-control system works as a brain and a servo motor provides power, so multi-angle turning can be achieved and high precise drilling and milling can be vertically and horizontally positioned; and production efficiency can be improved, so labor use can be reduced and work time can be lowered.